Rightclicking in a balloon airship in 1.16.5 causes the player to "dismount" the airship, leaving them unable to re-enter or control the vehicle. However, they seem to still be considered as inside the craft, unable to break blocks or interact at all except right by the machine. doing a /kill on the craft makes the player actually dismount, even moving the player back to the ship as it breaks. I have confirmed this happens with no other mods installed save for JEI. Not tested in newer Minecraft versions, but it has been in the 1.16 mod for more than one update.